Electronic switching system



April 8, 1958 R. B. TROUSDALE 2,830,120

ELECTRONIC SWITCHING SYSTEM Filed March 4, 1955 47 Sheets-Sheet 1 NOTE S CONNECTED ON PARTY LINES ONLY DIODE R SWITCH INVENTOR. ROBERT B. TROUSDALE F|e,| NEW 1 AGENT April 8, 1953 R. B. TROUSDALE 2,830,120

ELECTRONIC SWITCHING SYSTEM Filed March 4 1955 47 Sheets-Sheet 2 LINKA- Jx LINK 2|; MULTIPLE TONES our POINT FIG. I4

l5 l7 RELEASE RELEASE LINE p PULSE PULSE AMPLIFIER GENERATOR F'NDER FIGJB Fm n FIGS. |9&20

SC SWITCH CONTROL FIG.9

BII LINK l2 MULTIPLE POINT RP RELEASE RELEASE PULSE PULSE AMPLIFIER GENERATOR SWITCH CONTROL April 8, 1958 R. B. TRouspALE 2,830,120

ELECTRONIC swncamc SYSTEM Filed March 4, 1955 I 47 Sheets-Sheet s LINK ALLOTTER CIRCUIT IAL TONE FIG. l2

CONNECTOR FIGS. 33-4I INCL AUXILIARY PULSE AMPLIFIER FIG.9

LB ABP UNITS BUSY LEAD CONVERTER B EMERGENCY SERVICE NUMBER FIGS. l0 an TENS TONE

TONE

CONNECTOR NEG. UNITS NECTOR BUSY AMPLIFIER FIGJB FINDER BUSY AMPLIFIER FIGJO April R. B. TROUSDALE ELECTRONIC SW ITCHING SYSTEM Filed March 4, 1955 47 Sheets-She et 5 LINK C cII LINK MULTIPLE 4 TONES OUT cIz POINT I MC 4 RP If I5C- l7c\ Rs RP RELEAsE RELEASE As LINE L- PuLsE PULSE FINDER :sf -c AMPLIFIER GENERATOR Fer HU {"MM "PX SWITCH /l6c L LB P05.UNITS SC I SPI POS.TENS

CONTROL 3 LG RDP ASl-C AL-C ./25 5 MULTIPLEXER PX AMPLFIER RINGING CONTROL RC DRIVER RC0 FIG. I4

NEe. Pos. mass. M TENS TENS UNITS POSMNITS A M r J I I r I RDP NTI 5E P'rI NUIIZ 5H PUIIZIsH SF REGISTER TENS RING UNITS RING sAMPLINe DRIVE AMPLIFIER AMPLIFIER PuLsE P a-E CIRCUITS CIRCUITS AMPLIFIER 35- FIG.24 Fl6.23 F|G.22 -29 II 33/I II I II 3I/ II II II SPO IIII'E' 34- 32- 30- N EgRL TENS RING I UNITS RING 25f? ("PUT PULSE RED cIRcu T v T50 CIRCUIT GENERATOR /43 FIG$. 24 aw FIG. 23 FIG. 22 m1 FIG.5

April 8, 1958 Filed March 4, 1955 CON N ECTOR TRUNK HUNTING 8 EXECUTIVE CUT IN MARKERS FIG. 25

FIG. 2I

MASTER TRUNK OSCILLATOR HUNTING AMPLIFIER R. B. TROUSDALE ELECTRONIC SWITCHING SYSTEM EXECUTIVE CUT IN AMPLIFIER FIG.26

FIG.26

47 Sheets-Sheet 6 FIG.6

April 8, 1958 R. B. TROUSDALE ELECTRONIC SWITCHING SYSTEM 47 Sheets-Sheet 7 Filed March 4, 1955 wdl April 8, 1958 R. B. TROUSDALE 2,830,120

ELECTRONIC SWITCHING SYSTEM Filed March 4, 1955 4'7 Sheets-Sheet 8 AUXILIARY PUI SE AMPLIFIER 20 R903 AMPLIFIER 92} CD904 Laa 1 A? e? cnsos f SPI SC FIG. 9'

A ril s, 1958 Filed March 4, 1955 ABP CDIO07 R. B. TROUSDALE 2,830,120

ELECTRONIC SWITCHING SYSTEM 47 Sheets-Sheet 9 BUSY LEAD CONVERTER 4 EMERGENCY SERVICE NUMBER CIRCUIT 2| TIOGO EMITTER FOLLOWER FIG. IO

A ril s, 1958 R. B. TROUSDALE ELECTRONIC SWITCHING SYSTEM Filed March 4, v 1955 47 Sheets-Sheet 1O BUSY LEAD CONVERTER 8: EMERGENCY SERVICE NUMBER CIRCUIT 2| CDIIOI I N Ilol M2 STA V1 QUARTER conoz .i fli DECK STATION LINE CIRCUIT uosI 5 EMERGENCY T 1 225 SERVICE R 0 PILOT HOUSE LINE CIRCUIT STATION STATZIgII NO. LINE CIRCUIT SWITCH POSITION pus [Pm gfJiRTER DECK PTO 2.

3.PILOT HOUSE I TENS A POS.UNITS EMERGENCY SERVICE NUMBER RDP SWITCH IIOO ABP MPX FF ARTIFICIAL F5 BUSY SWlTCHES- cones I F PUI CDHOB Pu4 o-PUS f o-PU6 Asl-A PUE O\ PU8 POS.UNITS L pus o PU0 3 UNITS 35 SELECTOR m mo cDuo'r I e\ PT3 I C81 PTI POSJENS v 52. PT6 :21 I PM a 0- PT5 T, ii] I o PT6 o .P1'7

o-PT8 \--PT9 .P'ro Y T TENS 24 SELECTOR April 1958 R. B. TROUSDALE 2,830,120

ELECTRONIC SWITCHING SYSTEM Filed March 4, 1955 4'7 Sheets-Sheet ll LIN K ALLOTTER CI RCU IT 19 MANUAL 4.5 STEP Rl2l3 I240 I CDIIZIO RING STAGE 3 To IZIOB TO IZIOC mE AL-B J AL-C FINDER F'NDER FIG. l2

April 3, 1958 R. TROUSDALE 2,830,120

ELECTRONIC SWITCHING SYSTEM Filed March 4, 1955 47 Sheets-Sheet 12 LINE CIRCUIT II Tl340 II T W5I3OI 0| A 0 E543 "a3 & N02,,

llbl

I344 TO 01005 Ilb3 SWITCH CIRCUITIIB IIbZ llcl CRING I345 63 T0 DIODE Rl302 SWITCH c2 CIRCUITIIC I346 SLEEVE V Tl350 RI3IO man M|| vv l I RINGING CONTROL OSCILLATOR RINGING 1320 CONTROL GATE i RRP RTP FIG. I3

April 1958 R. B. TROUSDALE 2,830,120

ELECTRONIC SWITCHING SYSTEM Filed March 4, 1955 47 Sheets-Sheet l3 DIODE LINK SWITCH CIFSEIT. llA MULTIPLE EINT I3A fi I N. fijll D, 1' 4 0 (I402 .ITONES 3, Rl406 1? CI4DI :cmos l::' 7 came:

I\L v: a

RHOZ

NOTE! OUTPUTS OF ALL I00 DIODE SWITCH cmcurrs m LINK'A" DIODE M05 couusc'r TO THESE swncn TERMINALS CONTROL 4 co|4o4 RP Mll RINGING CONTfiL DRIVER 27 R I408 Rl407 RCO FIG. I4

- R. B. TROUSDALE ELECTRONIC SWITCHING SYSTEM Filed March 4, 1955 47 Sheets-Sheet 14 SPI SC CHANNEL PULSE MATRIX 2s NTI TO cm CPIO LINE PDH {CIRCUIT NEG. TENS i A NT2 I l CPZI c922 cPzo LIN CIRCUIT "l |1 I I I m h k l NTO cPoI cPoz cPo o -4 NuI Kuz NUO y I I NEG UNITS Mll TONES OUT p NEG. Pos.uNITs-I UNITS April 1958 R. B. TROUSDALE 2,830,120-

' ELECTRONIC SWITCHING SYSTEM Filed March 4, 1955 47 Sheets-Sheet 15 'SPI l sc LG nseJsus uee.um1's MULTIPLEXER 24 NEILkTENS TONES OUT POS. UNITS NEG. TENS SP RP April 1958 R. B. TROUSDALE 2,830,120

ELECTRONIC swncnmc SYSTEM Filed March 4, 1955 I 47 Sheets-Sheet 16 NEG.TENS NEG.UNIT$ MULTIPLEXER OUTPLL' AMPLIFIER 25 'rmo ' MPX AMPLIFIER I700 conol RELEASE PULSE GENERATOR I5A rrrso ASTABLE OSCILLATOR As RI70| I720 cpn'oz nnos FIG. IT

TONES our POS.UNITS RP POS.UNITS POS. TENS April 1958 R. B. TROUSDALE 2,830,120

ELECTRONIC swncnmc SYSTEM Filed March 4, 1955 47 Sheets-Sheet 17 POS.TENS LG MPX CONNECTOR BUSY AMPLlFlER 22 Halo RELEASE PULSE AMPLIFIER MA Fa naso AL-A MPX LG msoz RP TONES oun -POS.UNITS POS.TEN$\ ASl-A ca LG RDP April 8, 1958 R. B. TROUSDALE ELECTRONIC SWITCHING SYSTEM Filed March 4, 1955 LINE FINDER ITA 4'? Sheets-Sheet 18 UNITS REGISTER I v K I unn'sz UNITSO CDI903 c1902 R'SHJ: I980 I990 CIQIO? colsoa Pos.um'rs Como? v N CDI909 CDIQIO Pos.'rENs,,

CUT RI9I8 GATE AMPLIFIER 1%? R1903 9o RIQOB R1902 clso cur H- THROUGH Cl906 OUTPUT uses msos R RELEASE I DELAY NFG ALLOTTER R1907 START I95OA AS LG 5222" I95OB ASl-A A MFG-"'1 FRA-- ASl-A RS- FCT p 1958 R. B. TROUSDALE 2,830,120

ELECTRONIC SWITCHING SYSTEM Filed March 4, 1955 47 Sheets-Sheet 19 ITEMS LINE FINDER I7A REGISTER PULSER zooo RZOOI TENS REGISTER r A CZOOI czooz cozoos ll TENSI TENS 2 ZOIO 2020 -l I 9 nzoos cozooz i N R2009 I PTI Pos. TENS PT2 cozoos c2oos= FINDER GATE AMPLIFIER zoso v cozoos FINDER R2005 T2060 4 I PULSE GATE FCT

FIG. 20

April s, 1958 R. B. TROUSDALE ELECTRONIC SWITCHING SYSTEM Filed March 4, 1955 MASTER OSCI LL61) R 28 UNITS RING QRIVE 43 RZIIO 47 Sheets-Sheet 2O RRP RTP

SPD

ZISZ

CDZIOB 

